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AMERICAN <br /> kYrLABORATORY QA/OC REPORT <br /> cliea - <br /> t: Thrifty Oil Company Sample Xatrix: Water <br /> Metbod: EPA 8020 (BTEX) , QC, Spike Date Analyzed: 6/9/92 <br /> AA Project No. : A135172-1 Date Reported: 6/22/92 <br /> Spike Spike/Duplicate <br /> Compounds Recovery Recovery RPD <br /> (%) M M <br /> ----------------------------..~------~----------------_....------_..__.._� <br /> Benzene 100 112 11. 3 <br /> Toluene 103 115 11. 0 <br /> Ethyl Benzene 100 112 11. 3 <br /> Total Xylenes 102 115 12 . 0 <br /> .....-___. ..,.--------------------------------.._..------~-....___----_.._____ <br /> RPD = Relative Percent Diff/tjmerence, 100[ (x, - X2)/{ (X, + x2)/2 ) ) <br /> Larry L. Schale r, Ph.D. <br /> Laboratory Director <br /> ff/tjm <br /> American Analytics • 9765 Eton Avenue, Chatsworth, California 91311 <br /> Tel ( 818 ) 998 - 5547 + (800 ) 533 - 8378 * Fax ( 818 ) 998 - 7258 <br />